VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1290

DTC Code DTC Name
C1290 Steering Angle Sensor Zero Point Malfunction

DESCRIPTION

The skid control ECU acquires steering angle sensor zero point every time the ignition switch is turned on (IG) and the vehicle is driven at 35 km/h (22 mph) or more for approximately 5 seconds. The ECU also stores the previous zero point.

If front wheel alignment or the steering wheel position is adjusted without disconnecting the negative battery terminal, or if yaw rate and acceleration sensor zero point is not acquired after the adjustments have been completed, the skid control ECU detects the difference between the previous zero point and newly acquired zero point and outputs this DTC to indicate a poor adjustment.

Warning operation for the steering angle sensor zero point malfunction will be cancelled by turning the ignition switch off.

DTC Code DTC Detection Condition Trouble Area
C1290 The newly acquired steering angle sensor zero point vastly differs from the previous one.

  • Yaw rate and acceleration sensor zero point calibration incomplete

  • Poor adjustment of the center position of the steering wheel

  • Poor adjustment of front wheel alignment

INSPECTION PROCEDURE

Note

When replacing the brake actuator assembly, perform zero point calibration Click here.

PROCEDURE


  1. PERFORM ZERO POINT CALIBRATION OF YAW RATE AND ACCELERATION SENSOR


    1. Perform zero point calibration of the yaw rate and acceleration sensor Click here.

      Tech Tips


      • When the stored zero point of the yaw rate and acceleration sensor is erased, steering angle sensor zero point will also be erased.

      • If the zero point and output value of the yaw rate and acceleration sensor and the output value of the speed sensors are not normal, steering angle sensor zero point cannot be acquired normally even if the vehicle is driven straight ahead at 35 km/h (22 mph) or more.


    NEXT

  2. CHECK STEERING ANGLE SENSOR ZERO POINT CALIBRATION


    1. Turn the ignition switch off.

    2. Start the engine.

    3. Drive the vehicle straight ahead at 35 km/h (22 mph) or more for at least 5 seconds.

    4. Check that the center position of the steering wheel is correctly set while driving straight ahead.

      Tech Tips

      If front wheel alignment and steering position are adjusted as a result of an abnormal center position of the steering wheel, acquire yaw rate and acceleration sensor zero point again after adjusting front wheel alignment and steering position again.

      OK
      The center position of the steering wheel is correctly set.

    NG

    ADJUST FRONT WHEEL ALIGNMENT OR STEERING POSITION

    OK

  3. RECONFIRM DTC


    1. Turn the ignition switch off.

    2. Clear the DTCs Click here.

    3. Start the engine.

    4. Drive the vehicle and turn the steering wheel to the right and left at a speed of 35 km/h (22 mph) or more.

    5. Check if the same DTC is recorded Click here.

      Result
      Result Proceed to
      DTC (C1290) is not output A
      DTC (C1290) is output B

      Tech Tips

      If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step Click here.


    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

    END